Fix sqlite scripts. Closes #35.

SQL/sqlite.initial.sql

@@ -1,7 +1,7 @@
 CREATE TABLE ident_switch
 (
 	id
-		serial
+		integer
 		PRIMARY KEY,
 	user_id
 		integer

SQL/sqlite/2018121800.sql

@@ -1,25 +1,76 @@
-ALTER TABLE
-  ident_switch
-RENAME COLUMN
-  host
-TO
-  imap_host;
+PRAGMA foreign_keys=off;
+BEGIN TRANSACTION;
 
-ALTER TABLE
-  ident_switch
-RENAME COLUMN
-  port
-TO
-  imap_port;
+ALTER TABLE ident_switch RENAME TO ident_switch_old;
 
-ALTER TABLE
-  ident_switch
-ADD COLUMN
-	smtp_host
-    varchar(64);
-
-ALTER TABLE
-  ident_switch
-ADD COLUMN
+CREATE TABLE ident_switch
+(
+	id
+		integer
+		PRIMARY KEY,
+	user_id
+		integer
+		NOT NULL
+		REFERENCES users(user_id) ON DELETE CASCADE ON UPDATE CASCADE,
+	iid
+		integer
+		NOT NULL
+		REFERENCES identities(identity_id) ON DELETE CASCADE ON UPDATE CASCADE
+		UNIQUE,
+	username
+		varchar(64),
+	password
+		varchar(64),
+	imap_host
+		varchar(64),
+	imap_port
+		integer
+		CHECK(imap_port > 0 AND imap_port <= 65535),
+	label
+		varchar(32),
+	flags
+		integer
+		NOT NULL
+		DEFAULT(0),
+  smtp_host
+    varchar(64),
   smtp_port
-		int;
+    integer
+    CHECK(smtp_port > 0 AND smtp_port <= 65535),
+	UNIQUE (user_id, label)
+);
+CREATE INDEX IX_ident_switch_user_id ON ident_switch(user_id);
+CREATE INDEX IX_ident_switch_iid on ident_switch(iid);
+
+INSERT OR ROLLBACK INTO
+  ident_switch (
+    id,
+    user_id,
+    iid,
+    username,
+    password,
+    imap_host,
+    imap_port,
+    label,
+    flags,
+    smtp_host
+  )
+SELECT
+  id,
+  user_id,
+  iid,
+  username,
+  password,
+  host,
+  port,
+  label,
+  flags,
+  host,
+FROM
+  ident_switch_old;
+
+DROP TABLE
+  ident_switch_old;
+
+COMMIT;
+PRAGMA foreign_keys=on;